From: pertti.helander@pp.nic.fi   
      
   lauantai 7. tammikuuta 2023 klo 0.20.46 UTC+2 slavo...@gmail.com kirjoitti:   
   > Yep, too many variables - the PSU itself, planar, op panel cable, op    
   > panel assy.    
   >    
   > So let's test the parts one by one, starting with the PSU:    
   >    
   > Unplug the line cord, disconnect all disk drive Molex connectors, and    
   > swing the PSU out (or remove it completely for better access). Then    
   > short pins 1 and 2 on the PSU planar connector with a piece of wire and    
   > plug the line cord back in. The PSU should start. If it does, verify all    
   > DC voltages and the Power Good signal. If it doesn't power on, the PSU    
   > is faulty.    
   >    
   > Based on the described behavior, it may be just bad caps. Be careful if    
   > you are gonna recap the PSU - the caps may hold a charge for quite some    
   > time! There were quite a few different PSU models used in these    
   > machines, and many of them are quite complex with multi-board    
   > construction... this isn't a cheapo klone PSU.   
   > On 06.01.2023 22:56, Louis Ohland wrote:    
   > > I suggested shorting 1,2 on the PSU's connector to totally eliminate    
   > > issues on the op-panel PCB.   
   I shortened line power cord on pins 1-2 with piece of wire but no power on. I   
   checked with multimeter all pin values,   
   pins 20-21 was 5V, but all others were 0-0,1V so I guess PSU is broken. When I   
   after ten years in storage first time started my 8595 it powers on with some   
   checkpoint displays but it after few second went power off and never startet   
   again. PSU is Schrack    
   model EPO71119-E, input 200-20V 4.0A output 329W.   
   Is it difficult to check and repair or renew? Or must I look for spare part   
   CPU?   
      
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